This calculator allows you to convert from Mach (20°C, 1 atm) to Cosmic velocity - second and in a reverse direction. To convert from Mach (20°C, 1 atm) to Cosmic velocity - second, enter the amount of Mach (20°C, 1 atm) into the first input and to convert from Cosmic velocity - second to Mach (20°C, 1 atm), enter the amount of Cosmic velocity - second into the second input.